Numerical digit

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Numerical digits are the number text characters used to show numerals. For example, the numeral "56" has two digits: 5 and 6. In the decimal system (which is base 10), each digit is how many of a certain power of 10 are needed to get the value. The rightmost, or units digit,[1] is for 10^0, the next digit is for 10^1, etc.

The numeral "56" means:  6*10^0 + 5*10^1 = 6*1 + 5*10 = 6 + 50.

The ten digits of the decimal system are: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. Some numeral systems need more than ten digits. For example, the hexadecimal numeral system uses 16 digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F.

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  1. The units digit is the digit left from the separator, in case there is a fraction of the numerical base part of the numeral.